Wizards in the Muggle World Challenge

*Second edit of the challenge. I realized that $500 per person finding out you're an alien can be very costly if you're found out in a crowd! Poor Lord Vitalius was about to go broke when 3 people discovered he was an alien. I'm still not sure HOW they discovered it. Anyway, I reduced the rate to $100 and the rate of allowing them to keep their memories to $500 (think of it as a Ministry registration fee).